Barcelona wing back Dani Alves has claimed Chelsea blew their chance to reach
the 2009 Champions League final because of fear and not because of Norwegian
referee Tom Henning Ovrebo.

Ahead of Wednesday night's semi-final first leg between the two sides, Alves has reopened wounds from the controversial clash three years ago, when Chelsea claimed they were robbed of a final place.

Chelsea's then-boss Guus Hiddink claimed Ovrebo's performance was "the worst I have ever seen" by a referee, and Didier Drogba and Jose Bosingwa were both sanctioned for protesting at the final whistle.

But Alves told the Independent: "There is no doubt that was the hardest game we've played, but a team with a man advantage playing at home and winning should have attacked us more.

"People say Chelsea should have won but for the referee, but that is not our problem. We were there to play football, to compete and try to get to the final. Chelsea did not reach the final because of fear."

Barcelona midfielder Andres Iniesta is anticipating another tough night against Chelsea, but is hoping for a similar outcome to their last visit to Stamford Bridge.

It was Iniesta's stoppage-time strike in 2009 which earned Barca a 1-1 draw and sent them through to the final on away goals.

The Spain international said: "It's painful to be knocked out so close to the final. Now we are facing each other again and undoubtedly their desire to beat us and be in the Champions League final will be significant.

"We hope that things will turn out well for us again this time.

"We are going there with the intention of winning, to have a good game and commit as few mistakes as possible, as in the Champions League they are very costly. We always go out to win. We know that it is a knock-out tie and there is a return game, but our only intention is to win.

"It will be a tough 90 minutes. Chelsea are more experienced now, inevitably, and they have also changed some players. They have Fernando (Torres), (Juan) Mata and some other young players. Chelsea were very strong that year and the will be this year as well.

"They are very dangerous, very intense, and that will by multiplied in their stadium due to the atmosphere. We are expecting a very tough tie."

Iniesta also warned of the threat posed by some of Chelsea elder statesmen, such as Didier Drogba and Frank Lampard.

"They are dangerous for who they are, not because they are older or that it could be their last opportunity to win the Champions League," he said.

"You have to respect them because they are great players and right now are in a very good moment. I think it's going to be a very nice tie."